Department of Livestock Products Technology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab 14004, India; BioNanocomposite Research Center, Department of Food and Nutrition, Kyung Hee University, Seoul 02447, Republic of Korea.
BioNanocomposite Research Center, Department of Food and Nutrition, Kyung Hee University, Seoul 02447, Republic of Korea.
Int J Biol Macromol. 2023 Apr 1;233:123567. doi: 10.1016/j.ijbiomac.2023.123567. Epub 2023 Feb 7.
A new generation of carbon dot-based active and intelligent packaging films with UV blocking, antibacterial, and real-time sensing potentials was fabricated using Brassica oleracea (BO) extract. The cellulose nanofiber (CNF) was used to prepare the multifunctional intelligent nanocomposite film integrated with BO anthocyanins (BOA) and BO-biowaste-derived carbon dots (BO-CDs). The incorporation of 1.5 % BO-CD and 6 % BOA in the CNF matrix improved the physicochemical and UV blocking (>189 % increase) properties of the fabricated films. The synthesized BO-CD exhibits high fluorescence, UV absorption, antibacterial and antioxidant functions. It showed strong radical scavenging activity against ABTS (90 %) and DPPH (80 %) compared to the neat CNF film. Scanning electron microscopy and X-ray photoelectron spectroscopy (XPS) have shown enhanced compatibility and elemental composition of the BO-CDs/BOA additives in the CNF-polymer matrix. Packaging tests showed that the prepared film worked efficiently and non-destructively and was able to monitor the freshness of minced pork, fish, and shrimp in real-time through a distinct visual change from red to colorless/yellow during storage at 25 °C for 48 h. Active and intelligent films developed based on CNF/BO-CDs/BOA are expected to be applied as multifunctional packaging materials that can indicate quality changes and extend the shelf life of packaged perishable foods.
采用甘蓝（Brassica oleracea）提取物制备了具有紫外阻隔、抗菌和实时传感潜力的新一代基于碳点的活性智能包装膜。使用纤维素纳米纤维（CNF）来制备多功能智能纳米复合膜，该膜集成了甘蓝花青苷（BOA）和甘蓝生物废料衍生的碳点（BO-CDs）。在 CNF 基质中加入 1.5%的 BO-CD 和 6%的 BOA 可改善所制备薄膜的物理化学和紫外阻隔性能（提高了 189%以上）。合成的 BO-CD 具有高荧光、紫外吸收、抗菌和抗氧化功能。与纯 CNF 薄膜相比，它对 ABTS（90%）和 DPPH（80%）具有较强的自由基清除活性。扫描电子显微镜和 X 射线光电子能谱（XPS）表明，BO-CDs/BOA 添加剂在 CNF-聚合物基质中的相容性和元素组成得到了增强。包装测试表明，所制备的薄膜在 25°C 下储存 48 小时时，通过从红色到无色/黄色的明显视觉变化，可有效、无损地监测碎猪肉、鱼和虾的新鲜度，实现实时监测。基于 CNF/BO-CDs/BOA 的活性智能薄膜有望作为多功能包装材料得到应用，可指示质量变化并延长包装易腐食品的保质期。
